HP-UX Reference (11i v2 07/12) - 7 Device (Special) Files, 9 General Information, Index (vol 10)

v
vxfsio(7) vxfsio(7)
VX_FSO_DELAYLOG
Indicates that some system calls may return before the intent log is written. (See the
delaylog mount option of mount_vxfs (1M)).
VX_FSO_NODATAINLOG
Indicates that intent logging of user data for synchronous writes is disabled. (See the
nodatainlog mount option of mount_vxfs (1M)).
VX_FSO_NOLOG
Indicates that intent logging of structural changes to the file system is disabled. (See the
nolog mount option of mount_vxfs (1M)).
VX_FSO_OSYNC_CLOSESYNC
Indicates that any non-logged changes to the inode or data is flushed to disk when a file
accessed with O_SYNC is closed. (See the convosync=closesync
mount option of
mount_vxfs(1M)).
VX_FSO_OSYNC_DELAY
Indicates that any O_SYNC writes is delayed rather than to take effect immediately. No
special action is taken when a file is closed.
VX_FSO_OSYNC_DIRECT
Indicates that any O_SYNC I/O is handled as if the VX_DIRECT cache advisory had been
set on the file instead. Also, any non-logged changes to the inode or data is flushed to disk
when a file accessed with O_SYNC is closed. (See the convosync=direct
mount
option of mount_vxfs(1M)).
VX_FSO_OSYNC_DSYNC
Indicates that any O_SYNC writes is handled as if the VX_DSYNC cache advisory had been
set on the file instead. Also, any non-logged changes to the inode or data is flushed to disk
when a file accessed with O_SYNC is closed. (See the convosync=dsync
mount option
of mount_vxfs (1M)).
VX_FSO_OSYNC_UNBUFFERED
Indicates that any O_SYNC I/O is handled as if the VX_UNBUFFERED
cache advisory had
been set on the file. Also, any non-logged changes to the inode or data is flushed to disk
when a file accessed with
O_SYNC is closed. (See the convosync=unbuffered
mount
option of mount_vxfs(1M)).
VX_FSO_SNAPPED
Indicates that a snapshot backup of this file system is being maintained.
VX_FSO_SNAPSHOT
Indicates that this file system is a snapshot backup of another file system.
VX_FSO_TMPLOG
Indicates that the intent log is almost always delayed. (See the tmplog mount option of
mount_vxfs(1M)).
VX_FSO_VJFS
Indicates that the HP OnLineJFS product is not installed.
The VX_GETFSOPT ioctl returns a zero if the file system options are successfully obtained. If the
operation fails, the return value is -1 and the external variable errno is a general DIAGNOSTIC.
VX_SETCACHE
Set caching advisories. These advisories allow an application to indicate to the file system which
forms of caching are most advantageous.
Note: VX_SETCACHE is available with the HP OnLineJFS product only.
The values for arg are such that multiple advisories may be set by combining values with bitwise OR
operations. The possible values for arg are
VX_DIRECT
Indicates that data associated with read and write operations is to be transferred directly to
or from the user supplied buffer, without being cached. When this option is enabled, all I/O
operations must begin on block boundaries and must be a multiple of the block size in
length. The buffer supplied with the I/O operations must be aligned to a word boundary.
230 Hewlett-Packard Company − 3 − HP-UX 11i Version 2: December 2007 Update